~(box2df,box2df) — Returns TRUE if a 2D float precision bounding box (BOX2DF) contains another 2D float precision bounding box (BOX2DF).
boolean ~(
				  box2df 
				  A
				, 
				  box2df 
				  B
				);
The ~ operator returns TRUE if the 2D bounding box A contains the 2D bounding box B, using float precision. This means that if A is a (double precision) box2d, it will be internally converted to a float precision 2D bounding box (BOX2DF)
                 
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                 This operand is intended to be used internally by BRIN indexes, more than by users.  | 
            
Availability: 2.3.0 support for Block Range INdexes (BRIN) was introduced. Requires PostgreSQL 9.5+.
            
            This method supports Circular Strings and Curves.
        
            
            This function supports Polyhedral surfaces.
        
SELECT ST_MakeBox2D(ST_Point(0,0), ST_Point(5,5)) ~ ST_MakeBox2D(ST_Point(2,2), ST_Point(3,3)) AS contains; contains ---------- t (1 row)